California Edison Nails are all steel raised and found in Southern California. They have a Large "E" and the Date on the head of the Nail. The Unique one is the small 36, which has a very small Date and Letter "E" and is the rarest of the Edisons.SCE also has a set of copper Code nails consisting of 0-9 and the letters L S R.And several sets of Steel Round Indent Code Nails (Not Shown) SCE had its own treating plant which mostly refurbished poles.